Julius funcke



(No Model. I

J.FUNGKE.

LADDER SOAFPOLD. No. 596,151. Patented Dec. 28,1897.

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ATENT LADDER-SCAFFOLD.

SPECIFICATION forming part of Letters Patent No. 596,151, dated December28,1897. Application filed July 6, 1397. Serial No. 643,509. (No model.)

To wZZ whom, it may concern:

Be it known that I, J ULIUS FUNCKE, manufacturer, a citizen of theKingdom of Prussia, and a resident of Charlottenburg, near Berlin, inthe Kingdom of Prussia, German Empire, have invented certain new anduseful Improvements in Ladder-Scaffolds, of which the following is aspecification.

This invention relates to a ladder-scaffold.

As is well known, in the erection of buildings or to facilitatepainting, cleaning, &c.,

it is necessary to have an exterior scaffolding,

which must extend the entire height of the building. 1

' This invention therefore has for its object the utilization of laddersarranged vertically at intervalsin front of a building and properlybraced'to prevent lateral movement, each ladder being secured to theface of the wall of the building by suitable connections, and ascaffold-support attachable to the ladder at any point in its heightafter the ladder has been attached to the wall.

The object of the invention is, therefore, to provide simple andfficient means to secure the ladders to the face of the wall of thebuildin g and the foot-board, upon which the workmen stand and aresupported, to the ladders.

The invention consists, in combination with the ladder, of a bar, withmeans for adjustably securing the bar to the ladder, said'bar normallycarrying upon its outer end means comprising an expansion-bolt forsecuring the bar, and consequently the ladder, to the face of the wallof the building. I

The invention further consists in a novel form of support for thescaffold, comprising two independent sections, one section passingthrough and having a support within both of the sides of the ladder,being passed therethrough from the outer side, which allows of thesupport being attached to the ladder after the ladder is secured to theface of the wall, and a brace secured to the ladder and to the arm by asuitable clamp, which also serves the purpose 'to secure the foot-boardupon the support.

The invention still further consists in the parts hereinafter more fullydescribed and claimed.

In the drawings, Figure 1 is a side elevation of a portion of a ladder,illustrating the means for securing the ladder to the face of a wall andthe foot-board connection therewith. Fig. 2 is a front elevation, andFig. 3 is a plan view of the same. Fig. 4 is a detailed sectional viewof the expansion-bolt normally carried by the ladder-supporting bar forsecuring the same to the faceof a wall. Fig. 5 is a detailedperspectiveview of the end of the ladder-supporting arm, illustrating the pivotalhooks carried thereby.

A designates the ladder, which comprises the usual side pieces a and therounds or steps a, the ladder when in operative position in front of theface of the wall having the rounds thereof extending at right angles tothe wall.

13 designates the supporting-arm for the ladder, which is secured to theladder by the bolts 0, each having an inner curved end 0, which embracesa portion of the curved outer side a of the ladder, anda shank 0 extendsforwardly and through a longitudinal slot Z) in the arm B.

c is a nut screwing upon the shank c of the bolt 0, which bears againstthe face of the arm B to frictionally hold the arm in its adjustedposition upon the ladder. Pivotally secured to the arm at b are thehook-arms D, each of which is provided with a hook end d, oppositelyarranged to each other, the hookarms being held in a closed relation bya loop E, slidingly arranged upon the arm B and designed to contact withthe inclined sides e of the hook-arms D when the loop is moved forwardto hold the hook-arms in a closed relalation, as illustrated in Figs. 2and 5, the loop beingheld from movement upon the arm B by the set-screwc, screwing through the loop and bearing against one of the h00k-arms.

F designates an expansion-bolt, which comprises the body f, having abore of different diameters, an enlarged bore f of a uniform diameter,and bore f conical in shape. Seated in the bore f is the head G of theeyebolt 9, the'eyeloolt being screw-threaded and having secured thereonthe two nuts g, which are housed between theplates g and g p and whichserve to adjust the eyebolt longitudinally with reference to the bolt F.Within the .head G is a longitudinal screw-threaded bore, in whichscrews the stem H of the conical expanding-die h. The inner end of thebolt F is slotted, as at 1?", whereby the said end may be expanded, asshown in Fig. 1.

To secure the ladder to the face of the wall, the wall is first providedwith recesses J, which are enlarged slightly at their inner ends to forminclined sides. The bolt F is inserted therein, the flange upon theplate g serving as a stop to limit the inward movement of the bolt. Theeyebolt is now revolved, which is accomplished by the operator graspingthe arm 13, which is secured thereto, the ends d of the hook-arms Dbeing engaged in the eye G of the eyebolt, and the die 7i isconsequently pulled forward, expanding the rear end of the bolt F tocause its exterior surface to frictionally impinge on the interiorsurface of the orifice in the bolt. The arm B is now brought forwardcoincident with the ladder and is secured thereto by the hookarms I), asshown in Fig. 3, thus providing a positive secure attachment between theladder and the wall, an attachment not liable to be detached by themovement of the ladder in any direction. Extending through the sides ofthe ladder at intervals in the height of the ladder are orifices ed, theorifices on each side being in horizontal alinement.

K designates a rod having a head upon one end of the same, the rod beingof a size to pass through the orifices c and to project into the spacebetween the ladder and the wall.

In setting the ladder-scaffold it is necessary to first secure theladder to the face of the wall and to then attach the foot-board theretoat the desired height. Consequently the foot-board support is arrangedupon the ladder after the ladder is secured to the wall.

By referring to Fig. I it will be readily seen that due to the length ofthe rod K it must be inserted through the orifices in the side of theladder from the outside,or in the direction of the arrow 1. Consequentlythe rod K must be a straight rod of a uniform size in crosssectionthroughout its entire length.

L designates a brace interposed between the inner end of the rod K andtheinner side of the ladder, the lower end of the brace being angled, asat Z, and extending into one of the orifices a in the side of theladder, the upper end Z being angled and extending parallel and inabutment with the rod K, and being secured thereto by a clamp M,embracing the end of the rod K and the angled end Z of the brace L,pressure being secured by the said screw on.

N designates the foot-board, which is supported upon the rod K and issecured thereon between the clamp M and the inner side of the ladder.Projecting upwardly from the clamp M is an angled finger m, whichprojeets over the edge of the foot-board to hold the foot-board downupon the rod K.

m is a setescrew upon the side of the clamp M, which bears against theangled endl' to secure the clamp upon the brace. It will thus be seenthat the clamp M has two operations to secure the inner ends of the rodand brace together and to clamp and secure the footboard upon the rodand against the inner side of the ladder.

The several parts of the device, being socured together as described, donot provide a multiplicity of loose parts which are liable to fall whensettingfthe scaffolding and thus injure the person, being a feature ofgreat importance. The arm B acting as a lever for turning the eyebolt Jdoes away with the necessity of using supplemental tools in setting thescaffolding, a feature of great importance in view of the height andposition of the workmen upon the ladder.

\Vhat I claim is- 1. In a ladder-scaffold, a ladder, a bar clampedthereto extending laterally across the same, oppositely-moving hook-armspivotally secured to the said arm, and an eyebolt and means for securingthe same in a building, the hooks upon the hook arm extending throughthe eye of the eyebolt from opposite sides of the same, substantially asdescribed.

2. In a ladder-scaffold, a ladder, a bar clamped thereto extendinglaterally across the same, oppositely-moving hook-arms pivotally securedto the said arm, an eyebolt and means for securing the same in abuilding, the hooks upon the hook arm extending through the eye of theeyebolt from opposite sides of the same, and a loop slidingly arrangedupon the bar for engagement with the hook-arms to hold them in a closedrelation in the eye of the eyebolt, substantially as described.

In a ladder-scaffold, a ladder, a bar clamped thereto extendinglaterally across the same, oppositely-moving hook-arms pivotally securedto the said arm, an eyebolt and means for securing the same in abuilding, the hooks upon the hook arm extending through the eye of theeyebolt from opposite sides of the same, a loop slidingly arranged uponthe bar for engagement with the hookarms to hold them in a closedrelation in the eye of the eyebolt, and a set-screw passing through theloop and bearing against one of the hook-arms to hold the loop in anadjusted position, substantially as described.

4-. In a ladder-support, a ladder, an arm adj ustabl y secured thereto,an expansion-bolt carried by the arm comprising a partially slottedshell, an eyebolt extending into the shell and having a revolutiontherein, means for adjusting the eyebolt longitudinally in the shell, awedge-shaped die located in the shell having a screw-threaded extensionextending into a screw-threaded bore in the inner end of the eyebolt,whereby when the eyebolt is revolved, the die is either moved forwardorbackward and the casing expanded or allowed to resume its normalcondition, substantially as described.

I11 testimony that I claim the foregoing as my invention I have signedmy name in presence of two subscribing witnesses.

JULIUS FUNOKE.

\Vitnesses:

W. HAUPT, HENRY IIAsrER.

